How to quickly compute the number of points on an Elliptic Curve (EC) has been a longstanding challenge. The computational complexity of the algorithm usually employed makes it highly inefficient. Unlike the general EC, a simple method called the Weil theorem can be used to compute the order of an E...

Based on the cognitive radar concept and the basic connotation of cognitive skywave over-the-horizon radar (SWOTHR), the system structure and information processing mechanism about cognitive SWOTHR are researched. Among them, the hybrid network system architecture which is the distributed configurat...

For spaceborne synthetic aperture radar (SAR) imaging, the dispersive ionosphere has significant effects on the propagation of the low frequency (especially P-band) radar signal. The ionospheric effects can be a significant source of the phase error in the radar signal, which causes a degeneration o...